Drawing-machine for coke-ovens.



PATENTED APR. 24, 1906! APPLICATION FILED MAR.2.1905.

5 SHEETS-SHEET1,

fiam'el M170 A TTORNEYS IVVENTOR WITNESSES:

No. 818,841. PATENTED APR. 24, 1906. R. D. MARTIN.

DRAWING MACHINE FOR COKE OVENS.

APPLICATION FILED MAR.2,1905.

5 SHEETSSHEET 2.

PATENTED APR. 24

N. D. MARTIN.

DRAWING MACHINE FOR COKE OVENS.

APPLICATION FILED MAELZ, 1905.

JV 5 SHEETS-SHEET 3.

WIT/158858:

INVENTOR JZicfiaztZflazzieZJ/ariin ATTORNEYS No. 818,841. PATENTED APR.24, 1906. R. D.' MARTIN.

DRAWING MACHINE FOR COKE OVENS.

APPLICATION FILED MABHZ, 1 905,

5 SHEETS-SHEET 4.

BY W ATTORNEYS No. 818,841 PATENTED APR. 24, 1906.

R. D. MARTIN. DRAWING MACHINE FOR COKE OVENS.

APPLICATION FILED MAILZ, 1905.

5 SHEETS-SHEET 5.

iiillit w 1; I" 1 WITNESSES: I

1 o I AITORNEYS coke-oven C, from which the RICHARD D. MARTIN, OF LASESPERANZAS, MEXICO.

DRAWING-MACHINE FOR COKE-OVENS- Specification of Letters Patent.

Patented April 24, 1906.

Application fi March 2,1905. Serial No. 248.186.

To all whom it may concern:

Be it known that I, RICHARD DANIEL MAR- TIN, a citizen of the UnitedStates, and a resident of Las Esperanzas, Coahu'ila, Mexico, haveinvented a new and Improved Drawin Machine for Coke-Ovens, of which thef0 lowing is a full, clear, and exact description.

The invention relates to drawin -machines for coke-ovens, such as shown811(- described in the Letters Patent of the United States No. 681,064,granted to me August 20, 1901.

The object of the present invention is to provide a newand improveddrawing-machine which is simple and durable in construction, veryeffective in operation, and arranged to allow convenient manipulation ofthe machine through the small door of the coke-oven, and to permitdischarging the coke from the oven underneath the'machine withoutinterference with the working parts of the machine.

The invention consists of novel features and arts and combinations ofthe same, as Will e more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is i represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is an end elevation of the improvement as applied to acoke-oven, shown in cross-section. Fig. 2 is a plan view of the same,the coke-oven being shown in section.

Fig. 3 is an enlarged end view of the machine,

parts being broken out. Fig. 4 is a section on the line 4 4 of Fig. 3.Fig. 5 is an enlarged plan view on the line 5 5 of Fig. l of themechanism for imparting a traveling motion to the scraper-beam. Fig. 6is an enlarged end elevation of the mechanism for imparting anup-and-down swinging motion to the scraper, parts being shown insection. Fig. '7 is a section on the line 7 7 of Fig. 4, and Fi 8 is asection on the line 8 8 of Fig. 1.

The improved drawing-machine is preferably mounted on a flatrailroad-car A, mounted to travel on rails B, arranged in front of aroducts are removed at the proper time hy a scraper D through acoke-oven door-casing C over a chute E into a conveyer F, mounted on therailroad-ear A and discharging into a second conveyer F, arranged atright angles to the I I I conveyer F and having its delivery end soarranged as to discharge the coke to one side of the machine alongsidethe railroad-bed.

"Ihe scraper D consists, essentially, of a uideway D, in which ismounted to travel engthwise a scraper-beam D carr *in at its forward'enda number of scraperladies D D, and D arranged one in front of the otherand fulcrumed on the beam D in such a manner that the blades are free toswing when the beam moves inwardly in the oven, so that the blades rideover the coke, and when the beam D moves outward the said scraperbladesD D and D are-held in an angular position relative to the scraper-beam D(see Fig. 1) to cause the said scraper-blades to move the coke outwardlytoward the doorcasing C, the outward movement of the scraper-beam Dbeing suflicient for the scraper-blades D and D to pass practically outof the door-casing C to push the coke over the chute E onto the conveyerF, while the other scraper-blade D remains within the oven.

In order to impart the desired traveling motion to the scraper-beam D onits guideway D, an endless sprocket-chain G is provided, extendinglengthwise on the uideway D and passing over sprocket-whee s'G and Gjournaled in the ends of the guideway D, the sprocket-wheel Gr havin itsshaft Gr driven, as'hereinafter more fully described,

the said sprocket-chain being engaged at one oi its links in the lowerrun by a lug or pin D, pDrOjecting upwardly from the scraper-beam (SeeFig. 4.) When a traveling motion is given to the sprocket-chain G, thenthe link en aging the lug or pin D causes a forward oriackward travelingmotion of the scraperbeam D in its uideway D, according to the directionin which the sprocket-chain G is caused to travel at the time.

The guideway D is fulcrumed loosely at 'or near its middle on atransverse shaft H, (see Figs. 1, 3, 4, and 5,) journaled in the arms ofa fork I, depending from a swivel I, mounted to turn on the lower end Jof a support J, attached to braces J depending from a carriage K,mounted to travel forward and backward on a track L, preferably formedof channel-beams and secured to an overhead structure A, forming part ofthe railroad-car A. The carriage K is held against tipping on l thetrack L,. and for this purpose the carriage I gear-wheels O or O is inmesh at the time.

. wheel P, rotating at the time.

is provided with angle-irons K and K engaging the top and bottom flangesL and L of the channel-irons forming the track L. (See Fig. 4.) In orderto allow an easy traveling of the carriage K on the track L, thecarriage is provided with friction-rollers K traveling on the uppersurfaces of the flanges L of the track L.

A forward and backward traveling motion is given to the carriage K, soas to move the scraper in and out of'the oven C. For this purpose thecarriage K is provided on its top with a nut K in which screws ascrew-rod N, mounted to turn in a suitablebearing L carried by the trackL. (see Figs. 1 and 2,)

and on the said screw-rod N (see Fig. 83 is secured a spur-wheel N inmesh on opposite sides with gear-wheels O and O, journaled on a lever Ofulcrumed loosely on the screw rod N, the said lever O having a lockingdevice O adapted to engage one of a series of notches on a segment 0,attached to the track L. The gear-wheel O is an intermedi ate gear-wheeland is in mesh with a gear- -wheel O likewise journaled 0n the lever Oand the gear-wheels O and O are adapted to mesh with'opposite sides of agear-wheel P,

secured on a drivenshaft P, journaled in suit able bearings L and L inthe ends of the track L. (See Figs. 3 and 8.) On the shaft P is secureda sprocket-wheel P connected bya sprocket-chain P with a sprocket-wheelP*, secured on the shaft Q of a motor or engineQ of any approvedconstruction and mounted on the flat railroad-car A. Then the engine ormotor' Q is started, a rotary motion is transmitted by thesprocket-wheels P and P and the sprocket-chain P to the shaft P, whichimparts a turning motion to the screw-rod N in either a forward orbackward direction, according to which of the two with the gear-wheel P,secured on the driven shaft Pf When the screw-rod N is driven in onedirection, the nut K travels from the right to the left, thus moving thecarriage K,

swivel I, and scraper D in a like direction that is, moving the scraper'D into an opei a tive positionand when the screw-rod N is turned in areverse direction then the carriage K is causedto travel from'lthe leftto the right, and with it the swivel I and the scraper l), to move thelatter out of the oven and into an inactive position.

It is understood that in order to reverse the motion of the screw-rod Nit is only necessary for the operator to unlock the lever O and thenimpart a swinginmmotion to the same, so as to move either t egear-whe'elO" or the gear-wh'elelO in mesh with the gearl/Vhen the carriage Kreaches its extreme position either to the left or to the. right, thenthe operator swings the lever G into an intermediate po-: sition to holdboth gear-wheels O and 0' out of mesh with the gear-wheel P, so that thescrew-rod N- is at a standstill, whilethe shaft P may be still drivenfrom the motor Q.

A traveling motion is given to the shaft G of the sprocket-wheel'Gemployed for driving the chain G either forward or backward, with a viewto move the scraper-beam D as previously described, and for this purposethe, following device is provided: On the shaft G3 (see Fig. 5) issecured a bevel gearwheel G: in mesh with a bevel-pinion R, connected bya key and keyway witha shaft R, journaled in suitable bearings R and Rcarried by one'side of the guideway D, and on the said shaft R issecured another bevelwheel H,- secured on the shaft H, on which thescraper-guideway Dis mounted to swing loosely as a fulcrum. The bevelgear-wheel H is in mesh with a bevel gear-wheel H secured on the lowerend of a vertically-disposed shaft H journaled in the support J,

on which the swivel I is mounted to turn, it being understood that theaxis of the said shaft H and that of the swivel I coincide,the.coinciding axis bein disposed vertically. On.

the upper end of t e shaft H is secured a bevel gear-wheel H adapted to'be engaged .on opposite sides by either a bevel gearwhee S or S, havinga common hub S con-v nected by key and keyway with the shaft P, so'th'atwhen the latter is driven from the motor Q, as previously described,then the gearwheel S or S, in mesh with the bevel gear-' I wheel Himparts a rotary motion to the shaft H and as the latter is connected bythe gear-wheels H and H with the shaft H it is evident that the latteris rotated, and the rotary motion of this shaft H is transmitted by thebevel gear-wheel. H and pinion R shaft R, pinion'R, and gear-Wheel G tothe g shaft G to rotate the sprocket-wheel G with a view to impartatraveling motion to thesprocket-chain G in either directionthat is,accordingto which of the bevel gear-wheels S or S is in engagement withthe bevel gearwheel H at the time.

The connected gear-wheels S connected at their hub with a shifting-leverS fulcrumed on the support J and under the control of the operator, theshifting-lever- S being normally locked in either of ts two positions bya. suitable locking-arm S, hav

ing notches S and S for engaging a pin S on the shifting-lever S Whenthe bevel gearwheel S is in mesh with the bevel gear-wheel H, as shownin Fig. 3, then the pin S is en gaged by the notch S and When the bevelgear-wheel S is in mesh with the bevel gearwheel H then the pin S isengaged by the notch S. Thus in either positiontheshifting-lever S isheld in a lockedposition to hold the corresponding'bevel gearvwh eel Sor 'S in mesh withthe bevel gear-wheel H The lever S may be movedto-an'inactive and S are "8b pinion Rt, in mesh with a double-bevelgear- I position, so that neither of the bevel gearwheels or S is inmesh with the bevel gearwheel H.

By mounting the scraper-guicleway l) on the swivel l the scraper can beturned laterally in any desired direction, so as to permit of reachingwith the scraper-blades every part in the oven 0, it being understoodthat after the scraper-guideway D has been swung laterally into thedesired position it is locked therein during the time the scraperbladesare active-that is, moved inward and outward with the scraper-beam D tomove the coke through the coke-oven casing C and over the chute E, aspreviously mentioned.

In order to lock the scraper-guideway in osition against sidewiseswinging, the fol owing device is provided: On the swivel I is secured aquadrant T, adapted to be engaged at any one of its notches by aprojection T, formed on a lever T under the control of the operator andfulcrumed at T 3 on the support J. hen the operator swings the lever Tupwardly to disengage the lug T from one of the-"hotches in the quadrantT, then the swivel I is unlocked to allow turning of the swivel to swingthe scraper laterally until the desired position is reached, and thenthe operator swings the lever T downward to engage the lug T wit-h thecorresponding registering notch of the quadrant T to lock the swivel Iagainst turning for the time being.

Xormally the scraper-guideway D is held in an approximately horizontalposition, and for this purpose flexible connections U and U areprovided, extending from opposite sides of the swivel I to connect withthe scraperguidcway D on opposite sides of its fulcrum on the shaft lil.(See Fig. 3.) Each of the flexible connections U and U consists,preferably, of a chain U and a spring U, and one end of the chain U isconnected with tho scraper-mildew y D, and the other end of the chain isconnected with one end of the spring U attached at its other end to theswivel 1. By the arrangement described the guideway D is normallysupported in a horizontal position; but the flexible CmiDGCtlOl'ls allowupand-down swinging of the guideway to bring the scraper-blades D, D",and D into proper position relative to the coke in the oven C.

In order to impart the up and down swinging motion to the scraper D, thefollowing device is provided: On the shaft H (see Figs. 5 and 6) issecured a brake-wheel V, engaged by a brake-band V, secured at one endat V to one side of the scraper-goideway D, the other end of the saidbrake-band V being pivotally comiectcd with a sliding nut V, havingpolygonal external shape and mounted to slide in a bearing V", securedtothe guidcway D. in the sliding nut V screws the threaded cud V of a rodV having its other end V threaded in an opposite direction to thethreads on the nut V, and

the outer end V 7 screws in a nut V attachedv 7 On the rod V is seto theguideway D. cured a collar V, having apertures in its periphery for theinsertion of a suitable tool to permit the operator to convenientlyturn. this rod V so as to screw the rod either forward or backward inthe nut V, it being understood that said movement of the rod V causes aforward or backward sliding of the nut V and its bearing V to apply thebrakeband V with more or less force on the peripheral surface of thebrake-wheel V. When the brake-band V is in frictional contact with thebrake-wheel V and the shaft H is rotated in a forward direction formoving the scraper-beam D inward in the oven C, then the brake-wheel Vis rotated, and with it the band V, so that the latter exerts a pull onthe nut V and as the latter is held on the guideway D it is evident thata swinging motion is given to the guideway-D to raise the forward endthereof, and with it the scraper-beam D and the scraper-blades D D and DThus the scraper-blades while traveling inward glide over the coke, andwhen the motion of the shaft H is reversed and the scraper-beam D iscaused to travel outward then the swinging motion of the guideway D isreversecL-that is, its forward end swings downward-so as to bring thescraper-blades D, D, and D in engagement with the coke to rake the sameforwardly to ward the oven-casing C and to finally push the coke throughthe said casing over the chute E onto the first conveyer F.

By the operator adjusting the rod V all wear between the brake-band Vand the bral e-wheel V can be taken up to insure a proper automaticswinging of the scraperguideway D in the manner above described.

In order to take up any undue slack in the chain G, employed forimparting a reciprocating motion to the scraper-beam D the shaft G ismounted in bearings G and G mounted to slide lengthwise in the sides ofthe scrapenguideway D, (see Figs. 1 and 5,)

IIC

the said bearings G and G being held ad justable by suitableadjusting-screws G The bearing R previously mentioned, forms art of thebearing G, (see Fig. 5,) and the )evel gear\vheel R is mounted to turnwith and to slide on the shaft K to allow adjustment of the bearings Gand G without disconnecting the bevel gear-wheels G and R.

The conveyors .F and F are preferably of the endless metallic slat-belttype and are driven by suitable gearing from the motor Q, (see Figs. 1and 2 but as the detail construction of the said conveyors and the modeof driving the same is not a part of this invention further descriptionof the same is not deemed necessary.

The operation is as follows: When the machine is not in use, then thescraper-beam D way D and the latter is in a right-hand end position, sothat the left-hand end of the guideway D is within the correspondingside of the car A to ermit of conveniently moving the latter a ongthe'rails B to bring the machine in front of the oven C, from which thecoke is to'be drawn. In order to do this, the chute E is placed inposition so as to connect the oven-door casing C with the conveyer F,and then the motor Q is started to rotate the shaft P, which latter 'bythe gear,-'

Wheels P, 0 O, and N rotates the screwrod N to move the carriage K fromits right- ,hand position to a left-'handposition along the track L. Indoing so the scraper D is carried bodily along, and consequently theleft-hand end of the scraper-guideway D is projected'through theoven-door casing G into the oven, as indicated in Fig. 1. When thisposition is reached, the lever O is thrown into an intermediatepositionto disconnect the screw-rod N from the shaft? to stop the rotation ofthe said screw-rod. The operator now swings the lever S into an activeposition to engage the bevel gear-wheel S with the bevel gear-wheel H torotate. the shaft H which by its connection with the shaft Gas'previouslydescribed, causes a travelin of the sprocket-chain G toslide the scrapeream D from the right to the left along the guideway D,and at the same time a tiltin motion is given to the uideway D by therake device reviously described, so that the scraper-bla es D3, D and Dglide readilyover the coke during the inward travel of, the beam D inthe oven C. When an in-' nermost position is reached by thescraperblades D D and D', then the operator r-everses the lever S so asto throw the bevel gear-wheel S out of mesh with the bevelgearwheel Hand to move the bevel gearewheel S into mesh with the bevel gear-wheelH. The traveling motion of the chain G' is now reversed and likewisethat of the scraper-beam D and the tilting of the guideway D isreversed, so that the scraper-bladeslY, D and D move downward in contactwith the coke and at the same time travel outwardly to draw the coketoward the oven-door casing C and finally over the chute E'to theendless conveyer F, which in turn delivers the material to the conveyerF, and the latter discharges the same to one side of the machine; Whenline of movement the operator unlocks the -swivel I by swinging thelever T upwardly, and then the operator'swings the scraper D.

laterally to the desired position, after which the swivel I is a ainlocked in place by the lever T The above-described operation ofimparting movement to the beam D and tilting the guideway D is thenrepeated,'so that the beam D works in the oven along another tire, ovenmay be drawn clear of the-coke, as

each and .every part within the oven can be time being governed by theaction of the tilting .device-that is, by the frictional contact betweenthe brake-band V and the brake:

wheel V.

Instead of the reversing-gearing S, S, and,

line of movement, and in this manner the en- H the shaft H may bereversed by revers ing the motor every time the scraper-beam reaches itsextreme inward or outward position. In this case the bevel gear-wheel Sis dispensed with and only the bevel gear-wheel S isused andthrownout-of mesh with the bevel gear-wheel H by theshifting-lever S wheneverthe carriage K is shifted from an inactive to an active position, orvice versa, on shifting the lever 0 as previously mene tloned.

It will be evident from the description that when motion is imparted tothe scraper to move it into the oven the first action of the .shaft Hwill be to tighten the brake, which will elevate the guidewayand thescraper.

The provision of the chains 11 prevents undue lifting of the scraper,such lifting merely bein sufficient to carry the scra or above the co e.When the rear' end 0 the oven is reached, a reverse movementof the shaftH immediately swings the scraper downward into contact with the coke. Yr

Having thus described my invention, I claim as new and desire to secureby Letters Patent' I 1. Ina drawing-machine, the combinationof atrackway, a carriage upon the trackway,

.a swivel supported by the carriage, a guideway mounted to swing up anddown on the swivel, means forlimiting the swinging movement of' theguideway with respect to vthe swivel, a scraper-beam slidably mounted onv the guideway, a scraper on the scraper-beam,

means for moving the scraper-beam longitudinally of the guideway, andmeans whereby movement of the beam in one direction may 1 swing theguideway downward and whereby movement in theopposite direction'mayswing the guideway upward.

said shaft, and a carriage mounted to travel 1 forward and backward, tomove the scraper in and out of an operative position.

A drawing-machine having a scraper provided with a guideway, ascraper-beam mounted to travel on the said guideway, a scraper-blade onthe scraper-beam, a swivel on which the scraper-guideway is fulcrumed toswing up and down, the axis of the swivel being disposed vertically andmeans whereby the travel of the scraper-beam may swing the guideway.

4. A drawingmachine having a scraper provided with a guideway, ascraper-beam mounted to travel on the said guideway, a scraper-blade onthe scraperbeam, a swivel.

on which the scraper-guideway is fulcrumed to swing up and down, theaxis of the swivel being disposed vertically, means for imparting areciprocating motion to the said scraper-beam in-its guideway, and meanswhereby the reciprocation of the scraper beam may swing the guideway.

5. A drawing-machine having a scraper provided with'a guideway, ascraper-beam mounted to travel on the said guideway, a scraper-blade onthe scra er-beam, a swivel on which the scraper-gui eway is fulcrumed toswing up and down, the axis of the swivel being disposed vertically,means for imparting a reciprocating motion to the said scraper-beam inits guideway, the said means comprising an endless sprocket-chainmounted to travel on the said scraper-guideway and connected with thesaid scraper-beam and' a driving-gear for the said sprocketchain, havinga portion extending through the said swivel, and means whereby thereciprocation of the scraper-beam may swing the guideway.

6. A drawing-machine having ascraper provided with a guideway, ascraper-beam mounted to travel on the said guideway, a scraper-blade onthe scraper-beam, a swivel on which the scraper-guideway is fulcrumed toswing up and down, the axis of the swivel being disposed vertically,means for'imparting a reciprocating motion to the said scraper-beam inits guidcway, the said means comprising an endless sprocket chain,sprocketwheels journaled on the said guideway and over which passes thesaid sprocketchain, a longitudinal shaft journaled on the said guideway,gear-wheels connecting the said longitudinal shaft with one of the saidsprocket-wheels, a transverse shaft journaled in the said swivel and onwhich the said guideway is mounted to swing up and down,

a gearing connecting the said lon itudi'nal shaft with the saidtransverse sha a vertically-disposed shaft having its axis comcldingwith that of the swivel, and a gearing connecting the said transverseshaft withthe said vertically-disposed shaft.

7. A drawingmachine having a scraper provided with a uideway, ascraper-beam mounted to traveI on the said guideway, a scraper-blade onthe scraper-beam, a swivel on which thescraper-guidcway is fulcrumed toswing up and down, the axis of the swivel being disposed vertically,means for imparting a reciprocating motion to the said scraperbeam inits guideway, the saidmeans comprising an endless sprocket-chain,sprocketwheels journaled on the said guideway and over avhich passes thesaid sprocket-chain, a longitudinal shaft journaled on the saidguidewayf earwheels connecting the said longitudinaI shaft with one ofthe said sprocket-wheels, a transverse shaft journaled in the saidswivel and on which the said guideway is mounted to swing up and down, agearing connecting the said longitudinal shaft with the said transverseshaft,- a vertically-disposed shaft having its axis coinciding with thatof the swivel, a gearing connecting the said transverse shaft with thesaid verticallydisposed shaft, a main driven shaft, and amanually-controlled gearing connectin and isconnectin the said maindriven b a shaft with and from the said vertically-disposed shaft.

8. In a drawing-machine, the combination of a carriage, a swivelsupported by the carriage, a guideway mounted to swing up and down onthe swivel,-means for limiting the swin ing movement of the guideway, ascraper s idably mounted on the guideway, means for moving the scraperlongitudinally of the guideway, and means whereby movement of thescraper in one direction may swing the guideway downward, and wherebymovement in the opposite direction may swing the uideway upward.

9. In a' rawin -machine, the combination of a swivel, a gui eway mountedto swing up and down on the swivel, means for limiting the swim ingmovement of the guideway, a scraper s idably mounted on the guideway,means for moving the scraper longitudinally of the guideway, and meanswhereby movement of the scraper may impart a swinging motion to theguideway.

10. A drawing-machine having a scraper, a support, a swivel mounted toturn on the said support, the axis of the swivel being dis posedvertically and the said scraper bein mounted to swing up and down on thesai swivel, a carriage carrying the said support, an overhead guidewayfor thesaid carriage to travel on, and means for im arting forward andbackward motion to t e said carriage. V

11. In a drawing-machine, the combination of a swivel, a scraper mountedto swing up and down on the swivel, means for limitbeingl disposedvertically, and means wheree travel'of the scraper-beam may im-J by tpart an up-and-down swinging motion to the said scraper-guideway.

13. A drawing machine having a scraper provided with a guideway, ascraper -'beam mounted to travel on the said guideway, ascraper-blade'on the scra er-beam, a swivel on which the scraper-guieway is fulcrumed to swing up and down,- the axis of the swivel beingdisposed vertically, means for imparting an up-and-down swlnging motionto the sald scraper-guideway, the said means com- L prising a revoubles'haft journaled in the said swivel and forming the fulcrum for thesaid guideway, a brake-wheel secured on the said shaft, abrake-band forthe said brake-wheel,

I having one end fixed on the said guideway,

and means under the control of the operator andconnected with the otherend of the said brake-band, for adjusting the tension of'the band.

14. A drawing-machine having a scraper guideway, a scraper-beam eprovided with a on the said guideway, a

mounted to trav scraper-blade on the scra er-beam, a swivel on which thescraper-gui eway is fulcrumed to swing up and down, the axis of theswivel being disposed vertically, means for imparting an up-and-downswinging motion to the said scraperuideway, the said means comprisin arevo uble shaft journaled in the said swive andforming the fulcrum forthe said guidewa a brake-whee secured onthe said shaft, a rake-band forthe said brake-wheel, having one end fixed on the said guideway, asliding nut on the said guideway, connected with the other end of thesaid brake ba-nd, a

screw-rod having right and left hand screw-.

threads, of which one screws in the said sliding nut, and a nut fixed onthe said guideway and inwhich screws the other screw-thread of the saidscrew-rod.

' '15. A drawing-machine having a scraper mounted to trav scraper-bladeon the scra er-beam, a swivel provided with a guideway, a scraper-beamonthe said guideway, a

on which the scraper-gui eway is fulcrumed to swin up and down, the axisof the swivel being d sposed vertically, means for imparting an up-anddown swinging motion tothe said scraper-guideway, the said means compnsma revo uble shaft 'ournaled in the said swive and forming the lcrum forthe said ing isposed verticall guideway, a brake-wheel secured onthesaid with the other end of the said brake-band, a

screw-rod having right and left hand screwthreads, of which one screwsin the said sliding nut, a nut fixed on the said guideway and in whichscrews the other screw-thread of thesaid screw-rod, and means on thescrew-rod for allowing the operator to turn the same.

, 16. A drawing machine having a scraper, a support, a swivel mounted toturn on the said support, the axis of the swivel being disposedvertically and the said scraper being mounted to swing up and down onthe said swivel, manually-controlled means for locking the said swivelto the said support, means formoving the scraper longitu mally'withrespect to the swivel, and means whereby said'longitudinal movement mayswing the scraper.

17. A drawing machine having a scra er,

a swivel on which the scraper is mounte. to

swing up and down, the axis of the swivel being disposed vertically, andflexible and extensible connections between the'swivel' and the scraper,to hold the scraper approximately in a horizontal position and to allowup-anddown movement thereof. I

18. A drawing-machine having a scraper, to

a swivel on which the scraper is mounte swin up and down, the axis ofthe swivel being isposed vertically, and flexible connections betweenthe swivel and the scraper, to

hold the scraper approximately'in a horizontal position and to allowup-and-down movement thereof, each connection consisting of a chain anda spring.

19. A drawing-machine having a scra er, a swivel on which the scraper ismounte to swing upand down, the axis of the swivel being disposedvertically, and flexible connections between the swivel and the scraper,to hold the scraper approximately in a hOIlZOIl-r tal position and toallow up-and-down movement thereof, each connection consisting of achain connectedat one end to the scraper and ,a spring connected at oneend to the chain an at the other end to theswivel.

20. A drawing-machine having a scra er, a swivel on which the scraper ismounte to swin up and down, the axis of the swivel beextending obliquelyom opposite sides of the swivel, to connect. with the-said scraper onopposite sides of its fulcrum, means for, moving the scraperlongitudinally of the flexible connections swivel, and means whereby thelongitudinal turn on a vertical axis, a screw-rod screwing In testimonywhereof I have signed my in the said carriage and extending in thediname to this specification in the presence of rection of the travel ofthe carria e, a driven two subscribing witnesses.v shaft, and amanually-controlle reversing- RICHARD D. MARTIN.

5 gear for connecting the said driven shaft with Witnesses:

the said screw -rod, to rotate the latter in N. MORALES, eitherdirection. E. J. LOPEZ;

